Ion exchange model for α phase proton exchange waveguide in LiNbO3.

Torben Erik Veng, Torben Skettrup

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An H+/Li+ exchange model is found to be applicable to describe the diffusion of protons when optical waveguides are formed in LiNbO3 by proton exchange methods where the proton doped crystal structure stays in the pure α phase. The H + and Li+ self-diffusion coefficients in the ion exchange model are determined as a function of the proton exchange temperature both for x-cut and z-cut LiNbO3. In this way a very useful tool for predicting the proton concentration profiles and hence the refractive index profiles of α phase proton exchange LiNbO3 waveguides is achieved
Original languageEnglish
JournalJournal of Lightwave Technology
Issue number4
Pages (from-to)646-649
Publication statusPublished - 1998

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